US309802A

US309802A - Step-ladder

Info

Publication number: US309802A
Authority: US
Publication date: 1884-12-23
Anticipated expiration: 1901-12-23

Description

(No Modell.)

0. 8. RIGKARD.

STEP LADDER.

No. 808,802. Patented Deo. 28, 1884.

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UNITED STATES PATENT GEEICE.

CHARLEs s. RICHARD, or GRAND RAPIDs, MICHIGAN.

` STEP-LADDER.

SPECIFICATION forming part of Letters Patent No. 309,802, dated December 23, 1884.

Application filed October 9, 1884. (No model.)

To @ZZ whom t may concern:

Be it known that I, CHARLES S. RICHARD, a citizen of the United States, residing at the city of Grand Rapids, in the county of Kent and State of Michigan, have invented a new and useful Improvement in Step-Ladders, of which the following is a specication.

My invention relates to that class of stepladders so adjusted at the top and providedv with a hook at the base of one of the sections ofthe ladder that it may readily be extended to any givenheight and adjusted there, thus readily converting it from an ordinary stepladder to an extension-ladder. I attain these objects by the mechanism illustrated in the accompanying drawings, in which- Figure lis an elevation of the ladder eX- tended. Fig. 2 is a side elevation shown as a step-ladder. Fig. 3 isa perspective view of the lower portion or foot of section of the ladder, showing the hook attachment. Fig. et is a perspective view of the attachment to the upper portion of section C of the ladder, showing a ferrule or groove designed to allow section A of the ladder to readily slide loosely up or down; and Fig. 5 is a plan view of ferrule or groove casting attachment B B,

`showing relative positions of lugs F and H.

Similarletters refer to similar parts throughout the several views.

A and C are the two respective sections of the ladder, A being provided with steps c c, (which may be rounds,) and C with rounds l (l. The castings B F G H receive the upper ends of the respective standards of ladder-sectionOthrough the opening G, and for greater firmness is fastened by a bolt at f, passing through the casting and the upper ends of standards of ladder-section C, and secured with a nut.

D, e, and E is a shoe at the base of the respective standards of section A of the ladder, e being a spur extending into the wood to secure greater firmness of the shoe to the wood, D being the hook portion to hook over rounds c c when desired to be extended, and E being the strap portion at the opposite side of the standard, and is more firmly secured by wood-screws, as shown in Fig. 3.

B B are ferrules or grooves through which the respective standard portions of ladder-section A pass and rest against the lugs F F and H H, which lugs are respectively beveled at the front, H H, under and, F F, the back upper edges, so as to allow the ladder to stand at the proper angle and be self-supporting.

G shows an opening in the casting for the reception of the upper end of the standards of ladder-section C.

c represents the cap or platform of laddersection A; c c, steps or rounds; d d, rounds;

e, a spur, and f ahole for admitting a bolt that passes through the casting and top of standards of ladder-section C.

I am aware that prior to my invention an extension step -ladder has been made. I therelf)ore do not claim such a combination, broadly;

Vhat I do claim as my invention, and desire to secure by Letters Patent, is-

1. The combination ofthe standards of lad` der-section A and the castings B F G H, as adjusted and fastened to unite the two secL tions A and C of the ladder', as shown in Fig. 4, which castings are constructed by the respective lugs F H F H, forming the ferrules or groovesB B, through which the standards of ladder-section A pass, in connection with the openings G G, which receive the respect ive ends of the standards of ladder-section C `and form one piece of metal in one casting with the standards of ladder-section C, substantially as described.

2. lIhe shoe-casting D e E, as adjusted and fastened at the base of the standards of ladder-section A, forming hook D and resting on rounds d d, whereby the ladder is secured at any given extension, which casting forms a single piece of strap metal, substantially as described.

CHARLES S. RICKARD.

XVitnesses E. S. EGGLEs'roN, A. R. ROOD.